/*

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in compliance

 * with the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.bff.gaia.unified.sdk.util;



import java.io.ByteArrayInputStream;

import java.io.IOException;



/**

 * {@link ByteArrayInputStream} that allows accessing the entire internal buffer without copying.

 */

public class ExposedByteArrayInputStream extends ByteArrayInputStream {



  public ExposedByteArrayInputStream(byte[] buf) {

    super(buf);

  }



  /** Read all remaining bytes. */

  public byte[] readAll() throws IOException {

    if (pos == 0 && count == buf.length) {

      pos = count;

      return buf;

    }

    byte[] ret = new byte[count - pos];

    super.read(ret);

    return ret;

  }



  @Override

  public void close() {

    try {

      super.close();

    } catch (IOException exn) {

      throw new RuntimeException("Unexpected IOException closing ByteArrayInputStream", exn);

    }

  }

}